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Epidermal Collagen Reduction Drives Selective Aspects of Aging in Sensory Neurons.
Aging Cell
December 2024
Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
Despite advances in understanding molecular and cellular changes in the aging nervous system, the upstream drivers of these changes remain poorly defined. Here, we investigate the roles of non-neural tissues in neuronal aging, using the cutaneous PVD polymodal sensory neuron in Caenorhabditis elegans as a model. We demonstrate that during normal aging, PVD neurons progressively develop excessive dendritic branching, functionally correlated with age-related proprioceptive deficits.
View Article and Find Full Text PDFEarly developmental changes in GABAA receptor expression in nucleus accumbens medium spiny neurons.
Front Neurosci
December 2024
Stress Neurobiology Laboratory, Division of Basic Neuroscience, McLean Hospital, Belmont, MA, United States.
The expression of GABARs goes through large scale, evolutionarily conserved changes through the early postnatal period. While these changes have been well-studied in brain regions such as the hippocampus and sensory cortices, less is known about early developmental changes in other brain areas. The nucleus accumbens (NAc) is a major hub in the circuitry that mediates motivated behaviors and disruptions in NAc activity is a part of the neuropathology observed in mood and substance use disorders.
View Article and Find Full Text PDFExcitatory neuron-prone prion propagation and excitatory neuronal loss in prion-infected mice.
Front Mol Neurosci
December 2024
Laboratory of Veterinary Hygiene, Faculty of Veterinary Medicine, Graduate School of Infectious Diseases, Hokkaido University, Sapporo, Japan.
The accumulation of a disease-specific isoform of prion protein (PrP) and histopathological lesions, such as neuronal loss, are unevenly distributed in the brains of humans and animals affected with prion diseases. This distribution varies depending on the diseases and/or the combinations of prion strain and experimental animal. The brain region-dependent distribution of PrP and neuropathological lesions suggests a neuronal cell-type-dependent prion propagation and vulnerability to prion infection.
View Article and Find Full Text PDFDysregulation of synaptic transcripts underlies network abnormalities in ALS patient-derived motor neurons.
Am J Physiol Cell Physiol
December 2024
Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Norway.
Amyotrophic lateral sclerosis (ALS) is characterized by dysfunction and loss of upper and lower motor neurons. Several studies have identified structural and functional alterations in the motor neurons before the manifestation of symptoms, yet the underlying cause of such alterations and how they contribute to the progressive degeneration of affected motor neuron networks remain unclear. Importantly, the short and long-term spatiotemporal dynamics of neuronal network activity make it challenging to discern how ALS-related network reconfigurations emerge and evolve.
View Article and Find Full Text PDFBiocultural Aspects of Mental Distress: Expanding the Biomedical Model Towards an Integrative Biopsychosocial Understanding of Disorder.
Integr Psychol Behav Sci
December 2024
Laboratório de Neurociências e Comportamento, Faculdade de Psicologia, Instituto de Estudos em Saúde e Biológicas, Universidade Federal do Sul e Sudeste do Pará, Av. dos Ipês, S/N, Marabá, PA, 68500-000, Brazil.
To produce a theoretical approach about the relations between neuroscience and psychopathology that expands beyond the biomedical model to include a non-reductionist, enactive, and biocultural perspective. An integrative review, drawing from the biocultural approach from Anthropology, is used to produce examples from epigenetics, neuroplasticity, and functional neuroanatomy. A biocultural approach points to a brain that is highly plastic, reinforcing a much more complex model in which biological vulnerabilities and the historical-cultural environment co-construct each other.
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